Nice setup! Like some of the previous posts mentioned, I'd be sure backstops are adequate and that you aren't likely to have ricochets.
I had a nice 100 yard rifle range on some family property for years, and it was great. It was not without problems however, so I'll mention a few that grew into big problems and that eventually led me to sell the property.
1) You're going to have lots of friends, relatives, and plain strangers who want to use your range - most without permission. "I knew you wouldn't mind."
2) Remember that as the property owner, you have a great deal of legal liability for what occurs there. If somebody is accidentally shot, you're probably going to be sued.
3) You will find yourself cleaning up messes left by those who use your range. I've picked up a ton of old targets, tires, broken bottles, cans, empty propane bottles, and all manner of junk. "Gee I just wanted to see if my .30-30 would shoot through this old washing machine."
4) No trespassing signs make wonderful targets.
5) Carefully constructed benchrests make even better targets. "Golly, reckon this 12 ga. will shoot a slug through that 4x4?"
6) Local law enforcement will automatically assume they have permission to use the range and will invite all their friends and acquaintances.
I'm not mentioning all this to discourage you about your range, but you may want to give these problems some thought before you face them.